/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
/* Christopher Isherwood
   CSC 115
   9/30/2014
   Hour Glass Program 
   Homework #1
   This program will print a image of a hour glass depending on the size of the constant
   
   Used ideone.com to check code due to an "jGRASP wedge2 error: command "javac" not found." with jGRASP
   Had to use "public class Main" for the website.  Would normally use "public class HourGlass" 
*/
 
public class Main 
{
   public static final int SIZE = 17;
       public static void main(String[] args) {
        end();
        top();
        vertical();
        bottom();
        end();
    }
 
// Produces ends of the Hour Glass
    public static void end() 
    {
        System.out.print("|");
        int i;
        for (i=1; i <=SIZE*2+2; i++) 
        {
            System.out.print("\"");
        }
        System.out.println("|");
    }
 
// This produces the top half of the hourglass figure
    public static void top() 
    {
        for (int j=1; j <=SIZE; j++)
        {
         int i;
         for (i=1; i <=(j*SIZE)/SIZE; i++){
             System.out.print(" ");
             }
             System.out.print("\\");
         int k;
         for (k=j; k<=SIZE; k++){ 
             System.out.print("::");
             }
             System.out.println("/");
         }
        }
 
// This produces the bottom half of the hourglass figure
    public static void bottom() 
    {
        for (int j=1; j <=SIZE; j++)
        {
         int i;
         for (i=1; i <=(SIZE+1)-j; i++){
             System.out.print(" ");
             }
             System.out.print("/");
         int k;
         for (k=1; k<=j; k++){ 
             System.out.print("::");
             }
             System.out.println("\\");
         }
        }
     // Produces the middle bars
     public static void vertical() 
    {
        int i;
         for (i=1; i <=SIZE+1; i++) 
        {
            System.out.print(" ");
        }
        System.out.println("||");
    }
}

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import javax.swing.JOptionPane;

public class atividadtablasoscar
{
    public static void main (String[] args)
    {
        String menu, mensaje="";
        int opc=0, factorial, resultado=1, x, tabla; 
        int opcion; 
        do
        {
            try
            {
                menu="\n1) Tabla de Multiplicar \n2) Factorial \n3) Salir"; 
                opc=Integer.parseInt(JOptionPane.showInputDialog("Elige una opcion:"+menu));

                if (opc == 1)
                {
                    do 
                    {
                        mensaje="";
                        try
                        {
                            tabla=Integer.parseInt(JOptionPane.showInputDialog("Indica el numero de la tabla a multiplicar:"));
                            for (x=1; x<=10; x++)
                            {
                                mensaje=mensaje+"\n"+x+"*"+tabla+"="+(x * tabla);
                            }
                            JOptionPane.showMessageDialog(null, "La tabla es:"+mensaje);
                            
                           
                            opcion = JOptionPane.showConfirmDialog(null,"¿Quieres hacer otra tabla?","Confirmación", JOptionPane.YES_NO_OPTION);
                            
                        } catch (Exception e)
                        {
                            JOptionPane.showMessageDialog(null, "El valor no es un numero valido");
                         
                            opcion = JOptionPane.NO_OPTION; 
                        }

                    } while (opcion == JOptionPane.YES_OPTION); 
                }

                if (opc == 2)
                {
                    do
                    {
                        resultado=1;
                        try
                        {
               
                            factorial=Integer.parseInt(JOptionPane.showInputDialog("Indica el numero para calcular su factorial:"));
                            if (factorial < 0) {
                                JOptionPane.showMessageDialog(null, "caracter no valido");
                                opcion = JOptionPane.YES_OPTION;
                                continue;
                            }
                            
                            for (x=1; x<=factorial; x++)
                            {
                                resultado=x*resultado;
                            }
                            JOptionPane.showMessageDialog(null, "El factorial de " + factorial + " es: " + resultado);
                            
                                                       opcion= JOptionPane.showConfirmDialog(null,"¿Deseas calcular otro factorial?","Confirmación", JOptionPane.YES_NO_OPTION);

                        } catch (Exception e)
                        {
                            JOptionPane.showMessageDialog(null, "El valor no es un numero valido");
                                                     opcion = JOptionPane.NO_OPTION; 
                        }

                   
                    } while (opcion== JOptionPane.YES_OPTION);
                }
                
                if (opc < 1) {
                     JOptionPane.showMessageDialog(null, "Opción de menú no válida. Por favor, elige 1, 2 o 3.");
                }

            } catch (Exception e)
            {
                JOptionPane.showMessageDialog(null, "El valor introducido no es un número válido para la opción del menú.");
                opc = 0; 
            }
        } while (opc != 3);
        
       
        JOptionPane.showMessageDialog(null, "ADIOS");
    }
}